# Smog Report vs SG Air

The clearest difference is rating: Smog Report at 5.0 against SG Air's 3.0. Smog Report also leads on update cadence (weekly vs every 3 weeks). SG Air's advantage is review sentiment (80% vs 47%) and iOS requirement (13.0 vs 26.4). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Smog Report sells 4 one-off in-app purchases and SG Air sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Smog Report holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews complicate that: 47% of Smog Report's written reviews are positive against 80% of SG Air's, so the app with the better star average is not the one people write more warmly about.

Smog Report ships an update weekly, SG Air every 3 weeks. The most recent releases landed on November 10, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Smog Report | SG Air |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/smog-report/id607748201/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/sg-air/id881004442/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 47.4% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 22 MB |
| Requires iOS | 26.4 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Embay, LLC](https://appshunter.io/developer/1730783354) | [Sim Ruenn Kang](https://appshunter.io/developer/434116446) |

## What reviewers say

### Smog Report

[App page](https://appshunter.io/ios/app/smog-report/id607748201)

Monitor global air quality with real-time AQI data and forecasts. The app uses on-device AI for plain-English assessments and personalized tips, with visual cues reflecting current conditions. It offers extensive language support and privacy-focused processing.

**Highlights:** Real-time AQI for current location, On-device AI for daily assessments and tips, 5-day pollutant forecast, Live Activity alerts, Historical trend charts, Widgets for Home/Lock Screen, Apple Watch app

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fresh Air | $0.99 | one-time |
| Clear Skies | $2.99 | one-time |
| Perfect Day | $4.99 | one-time |
| Clean Air Hero | $9.99 | one-time |


### SG Air

[App page](https://appshunter.io/ios/app/sg-air/id881004442)

Access real-time and historical air quality data for Singapore, including PSI, AQI, and various pollutant levels. Receive hourly notifications for hazy conditions and view a haze map with hotspot locations. Contribute to crowdsourced reports and photos.

**Highlights:** 1-hr PSI/AQI Widget, Hourly haze notifications, Haze map with wind and hotspots, 24-hour data line charts, Crowdsourced air quality reports, SG Air Camera access

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Banner | $3.99 | one-time |


## Frequently asked questions

### Is Smog Report free?

Smog Report is free to download, with in-app purchases available.

### Is SG Air free?

SG Air is free to download, with in-app purchases available.

### Which has better reviews, Smog Report or SG Air?

Smog Report is rated higher. Smog Report averages 5.0 out of 5 from 2 ratings, while SG Air averages 3.0 from 2 ratings.

### Do Smog Report or SG Air have ads?

Both Smog Report and SG Air show ads.

### Which is updated more often, Smog Report or SG Air?

Smog Report ships an update weekly, and SG Air every 3 weeks. Most recently, Smog Report was updated on November 10, 2026 and SG Air on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*